fit, qualified, skilled; see able 1, 2.
sufficient, satisfactory, acceptable; see enough 1, fair 2.
responsible, accountable, duly constituted, sane, of sound mind, compos mentis (Latin); see also sane 1. See syn. study at able.
"competent." YourDictionary, n.d. Web. 17 August 2018. <http://thesaurus.yourdictionary.com/competent>.
competent. (n.d.). Retrieved August 17th, 2018, from http://thesaurus.yourdictionary.com/competent
Having the ability to perform well:
Being what is needed without being in excess: